Log Message:
Update dovecot2-pigeonhole to 0.4.0.

v0.4.0 09-05-2013 Stephan Bosch <stephan@rename-it.nl>

+ Added doveadm-sieve plugin that provides the possibility to synch Sieve
  scripts using doveadm sync along with the user's mailboxes.
+ Added the Sieve extprograms plugin to the main Pigeonhole package. It is
  still a plugin, but it is now included so that a separate compile is no
  longer necessary and distributors are likely to include it. The extprograms
  plugin provides Sieve language extensions that allows executing
  (administrator-controlled) external programs for message delivery,
  message filtering and string manipulation. Refer to
  doc/plugins/sieve_extprograms.txt for more information.
+ Added debug message showing Pigeonhole version at initialization. Makes it
  very clear that the plugin is properly loaded.
+ Finished implementation of the Sieve include extension. It should now
  fully conform to RFC 6609. The main addition is the new :optional tag which
  makes the include command ignore missing included scripts without an error.
+ Finished implementation of the Sieve environment extension as much as
  possible. Environment items "location", "phase" and \ 
"domain" now also
  return a usable value.